Jonatan Samuelsson

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The increasing proportion of video traffic in telecommunication networks puts an emphasis on efficient video compression technology. High Efficiency Video Coding (HEVC) is the forthcoming video coding standard that provides substantial bit rate reductions compared to its predecessors. In the HEVC standardization process, technologies such as picture(More)
  • J. Samuelsson
  • 2005 5th International Conference on Information…
  • 2005
Gaussian mixture model (GMM) based vector quantization (VQ) using a data-dependent weighted Euclidean distortion measure is presented. It is shown how GMM-VQ can be improved by using GMMs that model the optimal VQ point density rather than the source probability density as is done in previous work. GMM training procedures as well as procedures for encoding(More)
This paper describes the concept and a number of system aspects for the Dependent Random Access Point (DRAP) picture, a new feature that was recently introduced in the High-Efficiency Video Coding (HEVC) standard. A DRAP picture is an inter-coded picture that may only reference the previous Intra Random Access Point (IRAP) picture and provides a random(More)
In this paper we present a solution to a luminance artifact problem that occurs when conventional non-constant luminance Y'CbCr and 4:2:0 subsampling is combined with the type of highly non-linear transfer functions typically used for High Dynamic Range (HDR) video. These luminance artifacts can be avoided by selecting a luma code value that minimizes the(More)
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